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slip tongue[′slip ‚təŋ]
A pole on a horse-drawn wagon that is fastened by slipping it between two plates connected to the forecarriage.
spline, false tongue, feather, slip feather, slip tongue
1. A long thin strip of wood or metal which is inserted in a slot formed by two members, each of which is grooved and butted against the other.
2. In a suspended acoustical ceiling, a strip of metal or hard fiber inserted in the slot between adjacent acoustical tiles which butt against each other, forming a concealed mechanical joint.